108 ISCIIN'M mi 



lateral areas with black, as in some of the specimens from F -rnando 

 Noronha. Tin- granules or scales of the lateral area and on tin- 

 front and posterior valves are peculiarly Hat and arc somewhat 

 tran>versely arranged on the former and concentrically on the lat- 

 ter. The central areas are finely punctured along the center, and 

 become more and more coarsely grnnoM-ly lirate as the sides are 

 approached. One example is almost entirely reddi.-h purple, and 

 others are blackish with a broad pallid stripe down the middle from 

 end to end. (Smith.) 



('/litnn (Itcknochiton) caribbatorum (Yi:., J/.s'.. SMITH, .loiirn. 

 Linn. 8oc, I. 'iid., \x, p. 4 ( .>o', t. .'{(), f. ~>, 5a. 



The dimeiiHons given hy Srnitli may possibly he a mistake, for the 

 iark on his plate is only I-')' mill. long. In other respects the 

 description and figures indicate no tangible points of difference 

 from the /. .<t,'it,I<itu. 



< arpenter's original description of carribceorum is before me, 

 and it is an excellent word picture of some of the St. Thomas >pec- 

 imens of *t, -io/iit u*. It is worthy of note that Carpenter recogni/ed 

 the specific identity of >7/-/V>A////x, ciiriblm-nrinn, j<tnmi<-i-i,si. and 

 ."ijii'inin/oxi*, in one of his later notes. 



/.(/ oaribbasorum var.) jamaicensis Cpr. Smaller than <-n,-ibb(K- 



-. the lateral areas scarcely defined. 

 Length 7-j, hreadth 4, alt. 1 i mill. Habitat, Jamaica. 



/. (t jammcentis) viri<Hor Cpr. Larger than /. jnm 



i. variously maenlated with olive; interior: posterior valve 

 having x, anterior !, central valves 1 slit. Length 11 !, hrealth 7 

 mill.: di\n j IK 100. There is no character but size and color 

 by which this solitary specimen can be distinguished from the 

 Jamaican -hells. ( ( )//.) 



The spcific identity of the<e two .1/X forms with /. N/,vV//>//>- was 

 COncede.l I iy ( 'urpenter. 



Lfuniculahu Carpenter. Shell small, strongly oval, suhelevated, 

 the jii'jnm little acute: pale ashen, ochraceous or olivaceous varie- 

 gated: mucro central, moderately prominent. Kntire surface 

 wrinkh-d and minutely pitted: wrinkles >nhregul:r. nearly j.aral- 

 lel with the d..r-al rid_re on the central areas, ahout 1 x on each >ide, 

 Obsolete toward the jugum j the moderately distinctly defined lat- 

 M and the end valves undulated and having sul)ohsolete 

 radiating liruhe. Interior: posterior valve with 7-i>, anterior valve 



